dmaengine: ep93xx: Remove redundant word in comment

Remove the second 'to' which is repeated.

Signed-off-by: jianchunfu <jianchunfu@cmss.chinamobile.com>
Link: https://lore.kernel.org/r/20220403123120.7794-1-jianchunfu@cmss.chinamobile.com


Signed-off-by: Vinod Koul <vkoul@kernel.org>